Patents by Inventor John E. Dettmann

John E. Dettmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6761650
    Abstract: A football training apparatus provides for simultaneous strength and technique training to improve player strength as applied functionally to blocking. A frame structure includes left and right movable arms with strike pads mounted on the distal ends thereof The height of the strike pads is adjustable for differently sized players. A variable resistance mechanism provides a quantitative resistance to rearward movement of the arms. The frame structure is mounted on left and right rear wheels. When the left and right strike pads are driven rearward a sufficient distance a brake actuator mechanism is engaged to release independently operable brake mechanisms in the left and right rear wheels, respectively. Handles, with hand brake release mechanisms, may be provided on the rear end of the frame structure to allow the apparatus to be pushed without engaging the strike pads.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: July 13, 2004
    Assignee: Helgesen Industries, Inc.
    Inventor: John E. Dettmann